body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 20px auto;
    padding: 19px;
}

.container {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.box {
    flex: 1;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    padding: 8px 16px;
    margin: 5px;
    cursor: pointer;
}

.result {
    margin-top: 10px;
    padding: 10px;
    background: #f5f5f5;
    border-radius: 4px;
    min-height: 100px;
    white-space: pre-wrap;
}